iOS 11 Swift 4 iPhone X Safe Area 支持全屏ScrollView

Question

我目前将我的布局设计设置为一个 View Controller 上的全屏 ScrollView ，我在其中添加其他 View Controller 作为 subview 以创建分页效果。在普通的 iPhone 屏幕上，它的效果非常好。然而，当在 iPhone X 上运行时，事情似乎偏离了中心，我可以在一页中多次翻页。

这是我设置 ScrollView 的代码

self.scrollView.contentSize = CGSize(width: self.view.frame.width, height: self.view.frame.size.height * 3)
        if #available(iOS 11.0, *) {
            self.scrollView.contentInsetAdjustmentBehavior = .never
        } else {
            // Fallback on earlier versions
        }


        let V1 = self.storyboard?.instantiateViewController(withIdentifier: "S1") as! UINavigationController!
        self.addChildViewController(V1!)
        self.scrollView.addSubview(V1!.view)
        V1?.didMove(toParentViewController: self)
        V1?.view.frame = scrollView.bounds
        myViewsArray.append(V1!)

        let V2 = self.storyboard?.instantiateViewController(withIdentifier: "S2") as UIViewController!
        self.addChildViewController(V2!)
        self.scrollView.addSubview(V2!.view)
        V2?.didMove(toParentViewController: self)
        V2?.view.frame = scrollView.bounds
        myViewsArray.append(V2!)

        var V1Frame: CGRect = V1!.view.frame
        V1Frame.origin.y = 2*self.view.frame.height
        V1?.view.frame = V1Frame

        var V2Frame: CGRect = V2!.view.frame
        V2Frame.origin.y = (self.view.frame.height)
        V2?.view.frame = V2Frame

        V2!.view.alpha = 1

我在 Storyboard上有安全区域。

Answer 1

您可以使用 safe area layout guide 执行此操作，并使用链接获取更多信息:

https://medium.com/rosberryapps/ios-safe-area-ca10e919526f

您也可以在没有安全区域的情况下执行此操作:我为您准备了一个演示，在这个演示中，我们在 ScrollView 上添加了三个 View Controller ，在另一个 View Controller 上添加了 ScrollView (ContainerViewController )

ContainerViewController:

import UIKit

class ContainerViewController: UIViewController, UIScrollViewDelegate {

    @IBOutlet weak var scrollView: UIScrollView!

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.
        let V1 = self.storyboard?.instantiateViewController(withIdentifier: "first")
        self.addChildViewController(V1!)
        self.scrollView.addSubview(V1!.view)
        V1?.didMove(toParentViewController: self)
        V1?.view.frame = scrollView.bounds

        let V2 = self.storyboard?.instantiateViewController(withIdentifier: "second")
        self.addChildViewController(V2!)
        self.scrollView.addSubview(V2!.view)
        V2?.didMove(toParentViewController: self)
        V2?.view.frame = scrollView.bounds

        let V3 = self.storyboard?.instantiateViewController(withIdentifier: "third")
        self.addChildViewController(V3!)
        self.scrollView.addSubview(V3!.view)
        V3?.didMove(toParentViewController: self)
        V3?.view.frame = scrollView.bounds

        var V1Frame: CGRect = V1!.view.frame
        V1Frame.origin.y = 0
        V1?.view.frame = V1Frame

        var V2Frame: CGRect = V2!.view.frame
        V2Frame.origin.y = (self.view.frame.height)
        V2?.view.frame = V2Frame

        var V3Frame: CGRect = V3!.view.frame
        V3Frame.origin.y = (self.view.frame.height)*2
        V3?.view.frame = V3Frame
    }
    override func viewDidLayoutSubviews() {
        scrollView.contentSize = CGSize(width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height*3)
    }
}

Note: Remove top and bottom constraint from the safe area and add them from SuperView(for Scroll view, InnerView(FirstVC, SecondVC, ThirdVC))`

您可以检查演示项目的所有功能和限制。下载地址:https://www.dropbox.com/s/4ovfqmrtwt2i8yi/StackOverflow.zip?dl=0

我已经在iPhoneX和iPhone6和iPhone8+上测试了这个demo

Screenshots are below: